Lumps in the gums above the incisors may be caused by gum abscess, gingival tumor and gum cancer. 1. Gum abscess: If the gums are irritated by poor oral hygiene and calculus around the gums, the gums may become inflamed and there may be an abscess. When the gums are irritated by calculus for a longer period of time, it will cause the gums to swell and form an abscess, and the gums can be seen in the mouth to form a gum lump. 2. Gingival tumor: it may be gingival tumor, gingival tumor is a kind of benign tumor, which is protruding from the surface of mucous membrane, medium texture, like touching the tip of the nose as hard. 3. Gingival cancer: because clinically the early symptoms of many patients with gingival cancer are based on localized lumps, long time non-healing ulcer foci or pain in the gums. If you find that the gums above the incisors have lumps, you need to go to the stomatology department of regular hospital in time to find out the cause of the lumps and then treat them.